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A193437 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 7
5 31
6 91
7 931
8 7441
9 38017
10 507241
11 5864761
12 43501591
13 713059711
14 10776989587
15 105784464331
16 2052437475361
17 38263122487681
18 469863736958161
19 10518597616325617
20 232980391759702951
21 3446848352553524191
22 87385257330831947851

[1,1,1,1,7,31,91,931,7441,38017,507241,5864761,
 43501591,713059711,10776989587,105784464331,
 2052437475361,38263122487681,469863736958161,
 10518597616325617,232980391759702951,
 3446848352553524191,87385257330831947851]

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Last modified February 29 02:35 EST 2020. Contains 332353 sequences. (Running on oeis4.)